I am a prime number.
The double of myself is equal to the square of me.

which number am I?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

What is more useful when it is broken?

Using eight eights and addition only, can you make 1000?

In a fruit store, there was a unique weighing machine that was made to weigh only cherries and strawberries as they were priced the same.

Other fruits like watermelons or mango had different machines as they were expensive.

A man successfully buys watermelons at the price of cherries. How?

I am soft and cuddly that soothe your heart. But, If you pick my last name I am going to tear you all apart. Who am I?

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?